Die Datei: AbstractStack.java
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23public
24abstract
25class AbstractStack {
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33 public
34 abstract
35 boolean isEmpty();
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38 abstract
39 Object top();
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42 abstract
43 void push(Object o);
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46 abstract
47 void pop();
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58 final
59 boolean prePop() {
60 return
61 ! isEmpty();
62 }
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64 public
65 final
66 boolean preTop() {
67 return
68 ! isEmpty();
69 }
70
71}
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Die Quelle: AbstractStack.java
